A single component coating consisting of a heat-activated resin and corrosion resistant inert fillers for protecting metallic surfaces subject to corrosion under insulation (CUI) when the substrate temperatures are in the range of 158 °F to 302 °F (70 – 150 °C) Note: Be aware that although Belzona 5851 is tolerant of surface preparation, it requires the best possible surface preparation. Please consult its Instruction for Use for details. Note: Belzona 5851 uses Belzona 1251 as a rebuilding material for substrate pit filling and Belzona 9361 as reinforcing sheet.